import React, { Component } from 'react'

// 引入action
import {
  createIncrementAction,
  createDecrementAction,
  createIncrementAsyncAction
} from '../../redux/actions/count'

import {connect} from 'react-redux'

// 定义 UI 组件
class Count extends Component {

  state = { carName: '奔驰c63' }

  // 加法
  increment = () => {
    const { value } = this.selectNumber
    this.props.jia(value*1)
  }

  // 减法
  decrement = () => {
    const { value } = this.selectNumber
    this.props.jian(value*1)
  }

  // 奇数再加
  incrementIfOdd = () => {
    const { value } = this.selectNumber
    if (this.props.count % 2 !== 0) {
      this.props.jia(value*1)
    }
  }

  // 异步加
  incrementAsync = () => {
    const { value } = this.selectNumber
    this.props.jiaAsync(value*1)
  }

  render() {
    return (
      <div>
        <h2>我是Count组件，下方组件总人数为：{this.props.renshu}</h2>
        <h4>当前求和为：{this.props.count}</h4>
        <select ref={e => this.selectNumber = e}>
          <option value="1">1</option>
          <option value="2">2</option>
          <option value="3">3</option>
        </select>
        <button onClick={this.increment}>+</button>
        <button onClick={this.decrement}>-</button>
        <button onClick={this.incrementIfOdd}>奇数再加</button>
        <button onClick={this.incrementAsync}>异步加</button>
      </div>
    )
  }
}


// 使用connect()()创建并暴露一个Count的容器组件
export default connect (
  state => ({
    count: state.he,
    renshu: state.rens.length
  }),{
    jia:createIncrementAction,
    jian:createDecrementAction,
    jiaAsync:createIncrementAsyncAction
  }
)(Count)